overwrite_buffer::send_message Method
Visual Studio 2012
Synchronously passes a message from an ISource block to this overwrite_buffer messaging block. It is invoked by the send method, when called by a source block.
virtual message_status send_message( _Inout_ message<_Type> * _PMessage, _Inout_ ISource<_Type> * _PSource );
A message_status indication of what the target decided to do with the message.